MATLAB: An Introduction with Applications
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Author: Amos Gilat
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A population of values has a
Find P85, which is the score separating the bottom 85% scores from the top 15% scores.
P85 (for single values) =
Find P85, which is the
P85 (for sample means) =
Enter your answers as numbers accurate to 1 decimal place.
************NOTE************ round your answer to ONE digit after the decimal point! ***********
Answers obtained using exact z-scores or z-scores rounded to 3 decimal places are accepted.
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- Suppose the scores on a standardized test are normally distributed with mean μ=340μ=340 and the standard deviation σ=32σ=32. Use the normal distribution to find: The lowest test score in the top 15% bracket.Ans: The highest score in the bottom 20% bracket.Ans:arrow_forwardA population of values has a normal distribution with μ=158.8μ=158.8 and σ=91.9σ=91.9. You intend to draw a random sample of size n=141n=141.Inverse Normal CalculatorFind P10, which is the score separating the bottom 10% scores from the top 90% scores.P10 (for single values) = Find P10, which is the mean separating the bottom 10% means from the top 90% means.P10 (for sample means) = Enter your answers as numbers accurate to 1 decimal place.arrow_forwardExample 1. Given µ = 80, a = 20, n = 19. Find , Oi and Example 2. Given µ = -10, o = 5, n = 500, find F andi Solution: Solution: a. Solve for sample mean * : i = µ =-10 A. Solve for sample mean: * = 4 Σ=μ= 80 b. Solving for variance o? 5? 25 = 0.05 500 500 B. Solving for standard deviation: O: 20 20 - = 4.59 In V19 4.36 C. Solving for variance: ºi 20? 400 = 21.05 19 n 19 ACTIVITY: Find x¸ ºž andºi for the following. 1. Given u = 5.75, o = 1.02, n=81. 2. Given u = 128, o = 22, n=36. 3. Given u = 12, o = 1.5, n=90. 4. Given u = 72, o = 6, n=45. 5. A population has mean 5.75 and standard deviation of 1.02. If a random sample of 81 are taken, find the mean and variance of the sample mean.arrow_forward
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